Oxygen Sample Systems - GE moisture.iq User Manual

Chapter 1. Installation

1.6.2 Oxygen Sample Systems

Oxygen sample systems are required and can be ordered from BHGE for bench or wall mounting. You can also
build your own sample system by using the following guidelines.
IMPORTANT: The BHGE warranty will be voided if the sample system does not have a relief valve.
The basic sample system requirements are as follows (see Figure 2 below):
•
The oxygen cell requires a sample gas flow of 0.5 to 1 LPM (1 to 2 SCFH).
•
The gas pressure in the sample cell must be between 0.0 and 1.0 psig. The pressure must not exceed
1.0 psig.
•
A 10 psig pressure relief valve installed upstream of the oxygen cell is required to prevent
over-pressure.
•
A flow meter is required to measure the flow.
•
A pressure gauge is required to measure the pressure.
•
A flow regulating or needle valve is required and should be located upstream of the sample cell.
•
A pressure regulator is required for sample gas supplies of 50 psig or greater.
If a sample pump is required to draw a sample to the oxygen cell, the pump should be installed downstream
from the oxygen cell. You must also install a vacuum relief valve set at 1.0 psig between the oxygen cell and the
pump.
Note: The actual sample system design is dependent on the application requirements.
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Sam ple
Inlet
Figure 2: A Typical Oxygen Cell Sample System
Sam ple
Outlet
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